improve handling of bpftool not found error

test/integration-test/src/tests/load.rs

@@ -56,7 +56,11 @@ fn multiple_btf_maps() -> anyhow::Result<()> {
 }
 
 fn is_loaded(name: &str) -> bool {
-    let output = Command::new("bpftool").args(["prog"]).output().unwrap();
+    let output = Command::new("bpftool").args(["prog"]).output();
+    let output = match output {
+        Err(e) => panic!("Failed to run 'bpftool prog': {e}"),
+        Ok(out) => out,
+    };
     let stdout = String::from_utf8(output.stdout).unwrap();
     stdout.contains(name)
 }